If the three friends had been outside to observe what was taking place, they would have seen that these symptoms were simultaneous with occasional and extremely violent outbursts from the crater of Perboewatan and his compeers. Indeed they guessed as much, and two of them at least were not a little thankful that, awesome as their position was, they had the thick mountain between them and the fiery showers outside.
Of all this the hermit took no notice, but, hastening into the inner cavern, opened a small box, and took therefrom a bundle of papers and a little object which, at a first glance, Nigel supposed to be a book, but which turned out to be a photograph case. These the hermit put carefully into the breastpocket of his coat and then turned to his companions with a sigh as if of relief.
"I think there is no danger of anything occurring at this part of the island," he remarked, looking round the cave, "for there is no sign of smoke and no sulphurous smell issuing from any of the crevices in walls or floor. This, I think, shows that there is no direct communication with Rakata and the active volcano—at least not at present."
"Do you then think there is a possibility of an outbreak at some future period?" asked Nigel.
"Who can tell? People here, who don't study the nature of volcanoes much, though surrounded by them, will expect things ere long to resume their normal condition. I can never forget the fact that the greater part of Krakatoa stands, as you know, exactly above the spot where the two great lines of volcanic action cross, and right over the mouth of the immense crater to which Perboewatan and all the other craters serve as mere chimneys or safety-valves. We cannot tell whether a great eruption similar to that of 1680 may not be in store for us. The only reason that I can see for the quiescence of this peak of Rakata is, as I said to you once before, that it stands not so much above the old crater as above and on the safe side of its lip."
"I t'ink, massa, if I may ventur' to speak," said Moses, "dat de sooner we git off his lip de better lest we tumble into his mout'."
"You may be right, Moses, and I have no objection to quit," returned the hermit, "now that I have secured the photograph and papers. At the same time I fear the rain of stones and lava is growing worse. It might be safer to stay till there is a lull in the violence of the eruption, and then make a dash for it. What say you, Nigel?"
"I say that you know best, Van der Kemp. I'm ready to abide by your decision, whatever it be."
"Well, then, we will go out and have a look at the state of matters."
The view from the entrance was not calculated to tempt them to forsake the shelter of the cave, however uncertain that might be. The latest explosions had enshrouded the island in such a cloud of smoke and dust, that nothing whatever was visible beyond a few yards in front, and even that space was only seen by the faint rays of the lamp issuing from the outer cave. This lamp-light was sufficient, however, to show that within the semicircle of a few yards there was a continuous rain of grey ashes and dust mingled with occasional stones of various sizes—some larger than a man's fist.